Method for sending and detecting downlink control information, sending terminal and receiving terminal

The invention discloses a method for sending and detecting downlink control information, a sending terminal and a receiving terminal. The method comprises the following steps of according to the preset interval, determining a special searching space of a user terminal (UE (user equipment)) of an ePDCCH (enhanced physical downlink control channel) carrying downlink control information, wherein the preset interval is determined according to the number of candidate positions of a component carrier with a corresponding aggregation level in a corresponding resource set, or according to the number of candidate positions of the component carrier with the corresponding aggregation level in the corresponding resource set or the number of dispatched component carriers, or according to the number of candidate positions of the component carrier with the corresponding aggregation level in the corresponding resource set or the number of configured component carriers; detecting the downlink control information in the physical resource corresponding to the special searching space of the UE. The method can solve the detecting problem of the ePDCCH.